Longplay KeepCup has a Press fit lid, is lovely to drink from lid on or off.Made from Durable tempered glass and tritan sleeve creating a double wall insulated cup.Maintains temperature and protects your hands from heat Care: - Designed to be taken apart for thorough cleaning.- Dishwash safe, top rack - Heat to 100°C / 212°F. Lid off only.- One-year warranty on defects and faults